US2008167390A1PendingUtilityA1

Defoamer composition for suppressing oil-based and water-based foams

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Assignee: ARCHER JAMESPriority: Jun 1, 2006Filed: Jun 1, 2006Published: Jul 10, 2008
Est. expiryJun 1, 2026(expired)· nominal 20-yr term from priority
Inventors:James ArcherDaniel K. DurhamGeorge B. Thornton
C09C 1/3054B01D 19/0404B01D 19/0409C01P 2006/11C01P 2006/12C01P 2006/80C09C 1/3081
45
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Claims

Abstract

Defoamer compositions effective for the suppression of oil-based and water-based foams. The defoamer compositions comprise a fumed metal oxide, such as fumed silica, or another silica-based material dispersed in an organic solvent. The fumed metal oxide of silica-based material is preferably present at a low weight percentage and may be coated with polydimethylsiloxane (“PDMS”). The defoamer composition may also include one or more traditional defoamer compositions.

Claims

exact text as granted — not AI-modified
1 . A defoamer composition comprising a fumed metal oxide dispersed in an organic solvent. 
     
     
         2 . The defoamer composition of  claim 1 , wherein the fumed metal oxide is fumed silica. 
     
     
         3 . The defoamer composition of  claim 1 , wherein the fumed metal oxide is coated with an inorganic phosphate or an organic defoamer. 
     
     
         4 . The defoamer composition of  claim 1 , wherein the fumed metal oxide is coated with polydimethylsiloxane (“PDMS”). 
     
     
         5 . The defoamer composition of  claim 1 , wherein the organic solvent is methyl isobutyl ketone, acetone, methyl ethyl ketone, Stoddard solvent, kerosene, xylene, toluene, diesel, aliphatic refinery distillates, or combinations thereof. 
     
     
         6 . The defoamer composition of  claim 1 , wherein the fumed metal oxide is present at a weight percentage, based on the weight of the entire composition, of about 0.05 to about 20%. 
     
     
         7 . The defoamer composition of  claim 1 , wherein the fumed metal oxide is present at a weight percentage, based on the weight of the entire composition, of about 0.25%. 
     
     
         8 . The defoamer composition of  claim 1 , further comprising a second defoamer. 
     
     
         9 . The defoamer composition of  claim 8 , wherein the second defoamer is a non-fluorinated silicone or a fluorosilicone. 
     
     
         10 . The defoamer composition of  claim 8 , wherein the second defoamer is polydimethylsiloxane (“PDMS”). 
     
     
         11 . A method for suppressing oil-based and water-based foams comprising:
 injecting into the foams the defoamer composition of  claim 1 .   
     
     
         12 . A defoamer composition comprising a silica-based material dispersed in an organic solvent. 
     
     
         13 . The defoamer composition of  claim 12 , wherein the silica-based material is calcined silica micropowder, precipitated silica micropowder, silica aerogel, quartz micropowder, or fused silica micropowder. 
     
     
         14 . The defoamer composition of  claim 12 , wherein the fumed metal oxide is coated with an inorganic phosphate or an organic defoamer. 
     
     
         15 . The defoamer composition of  claim 12 , wherein the silica-based material is coated with polydimethylsiloxane (“PDMS”). 
     
     
         16 . The defoamer composition of  claim 12 , wherein the organic solvent is methyl isobutyl ketone, acetone, methyl ethyl ketone, Stoddard solvent, kerosene, xylene, toluene, diesel, aliphatic refinery distillates, or combinations thereof. 
     
     
         17 . The defoamer composition of  claim 12 , wherein the silica-based material is present at a weight percentage, based on the weight of the entire composition, of about 0.05 to about 20%. 
     
     
         18 . The defoamer composition of  claim 12 , wherein the silica-based material is present at a weight percentage, based on the weight of the entire composition, of about 0.25%. 
     
     
         19 . The defoamer composition of  claim 12 , further comprising a second defoamer. 
     
     
         20 . The defoamer composition of  claim 19 , wherein the second defoamer is a non-fluorinated silicone or a fluorosilicone. 
     
     
         21 . The defoamer composition of  claim 19  wherein the second defoamer is polydimethylsiloxane (“PDMS”). 
     
     
         22 . A method for suppressing oil-based and water-based foams comprising:
 injecting into the foams the defoamer composition of  claim 12 .

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